1. Why do children need to increase their height and supplement calcium? With the changes in modern lifestyle, more and more children are not reaching the standard height. Lack of calcium is an important factor affecting children\’s height development. Calcium is the main element that makes up bones and teeth, and is also involved in the normal operation of nerves, heart, and muscles. Therefore, children need to get enough calcium during growth and development to promote healthy development. 2. Which foods are rich in calcium? 1. Milk and dairy products: milk, acid